| 摘要 |
PROBLEM TO BE SOLVED: To provide a shape measuring method for lens surfaces formed in a non-circular shape resulting from cutting a circle along a secant as seen in the optical axis direction.SOLUTION: A shape measuring device measures along a first scanning line S1 and a second scanning line S2 the three-dimensional shape of the surface of a lens L formed by cutting a circle along a secant into a non-circular shape containing the center of the circle, figures out a first starting point M1 on the first scanning line S1 and a second starting point M2 on the second scanning line S2, and figures out as the optical axis center of the surface of the lens L the intersection point between a first perpendicular V1 orthogonally crossing the first scanning line S1 through a first starting point M1 and a second perpendicular V2 orthogonally crossing the second scanning line S2 through the second starting point M2.SELECTED DRAWING: Figure 8 |
